Replace the weak factory spherical bearings that are prone to quickly wear and quickly destroy the factory seals allowing dirt, mud and any foreign material to enter the A-arms This kit will replace all factory parts with 6 precision ground pivot pins, and 12 Acetal Thermoplastic bushings for longevity. This is one of the best upgrades for the Brute Force models. Kit includes all parts for all four A-arms (upper and lower, left and right).